Parasympathetic fibers destined for the lacrimal gland travel with which nerve after leaving the pterygopalatine ganglion?

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Prepare for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Parasympathetic fibers destined for the lacrimal gland travel with which nerve after leaving the pterygopalatine ganglion?

Explanation:
Parasympathetic postganglionic fibers destined for the lacrimal gland hitchhike with the zygomatic nerve after emerging from the pterygopalatine ganglion. The preganglionic fibers synapse in the pterygopalatine ganglion, then the postganglionic fibers ride along the zygomatic nerve (a branch of the maxillary division) into the orbit and reach the lacrimal gland via a small communicating branch to the lacrimal nerve. This route explains why lacrimation is driven by parasympathetic output that travels with the zygomatic pathway. The other nerves listed are primarily sensory branches within the orbit or face and do not serve as the highway for these lacrimal gland fibers.

Parasympathetic postganglionic fibers destined for the lacrimal gland hitchhike with the zygomatic nerve after emerging from the pterygopalatine ganglion. The preganglionic fibers synapse in the pterygopalatine ganglion, then the postganglionic fibers ride along the zygomatic nerve (a branch of the maxillary division) into the orbit and reach the lacrimal gland via a small communicating branch to the lacrimal nerve. This route explains why lacrimation is driven by parasympathetic output that travels with the zygomatic pathway.

The other nerves listed are primarily sensory branches within the orbit or face and do not serve as the highway for these lacrimal gland fibers.

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